Gear mechanism and geared motor

Abstract

The invention relates to a gear mechanism and a geared motor. Even though forming a limiting mechanism which utilizes the engagement of gears, a tooth part is not easy to damage. In the gear mechanism 6 and the geared motor 1, and when a motor small gear 34 (a first gear) and a gear ( a second gear ) are engaged to form the limiting mechanism, the limiting part comprising a tooth lacking part 617 not forming the tooth part 615 is arranged on the gear 61. In addition, the tooth lacking part 617 is equipped with a protruded part 617a protruded to an outer side in a radial direction with respect to a tooth tip circle F61 of the gear 61 and a recessed part 617b recessed to an inner side in the radial direction with respect to the protruded part 617a and adjacent to the protruded part 617a in a circumferential direction. Therefore, when the tooth part 345 of the electric small gear 34 is abutted against the recessed part 617b of the tooth lacking part (the limiting part), the protruded part 617a is abutted nearby the tooth tip circle P34 of the tooth part 345 of the electric small gear 34.

Description

technical field [0001] The invention relates to a gear mechanism and a gear transmission motor which utilize a plurality of gears to transmit force. Background technique [0002] In a gear mechanism configured in a geared motor or the like, when a stopper mechanism that limits the rotation angle range of the gear is provided, the engagement between the gears may be utilized. Specifically, in a gear mechanism having a first gear and a second gear meshing with the first gear, for example, a structure is proposed in which a valley portion sandwiched by teeth in the second gear is filled to form a stopper. (Refer to Patent Document 1). [0003] According to the above configuration, when the tops of the teeth of the first gear come into contact with the stoppers of the second gear, the first gear cannot rotate any further, and therefore, the rotation of the first gear can be stopped. [0004] prior art literature [0005] patent documents [0006] Patent Document 1: Japanese ...

AI Technical Summary

Problems solved by technology

[0007] However, in the structure described in Patent Document 1, when the rotation of the first gear is stopped by the stopper provided on the second gear, since the rotational force of the first gear is concentrated at the addendum of the first gear, the , there is a problem that the teeth are prone to breakage, deformation, cracking and other damage

Images